The advancement of electrochemical energy storage is closely bound up with the breakthrough of controllable fabrication of energy materials. Inspired by a popcorn fabrication from corn raw, herein a unique porous macrocellular carbon composed of cross‐linked nano/microsheets by a powerful puffing of rice precursor is described. The rice is directly puffed with a volume enlargement of ≈20 times when it is instantaneously released from a sealed environment with a high pressure of 1.0 MPa at 200 °C. Interestingly, when metal (e.g., Ni) nanoparticles are embedded in the puffed rice derived carbon (PRC), high‐quality PRC/metal composites are achieved with attractive properties of a high electrical conductivity of ≈7.2 × 10⁴ S m⁻¹, a large porosity of 85.1%, and a surface area of 1492.2 m² g⁻¹. The PRC/Ni are employed as a host in lithium–sulfur batteries. The designed PRC/Ni/S electrode exhibits a high reversible capacity of 1257.2 mA h g⁻¹ at 0.2 C, a prolonged cycle life (821 mA h g⁻¹ after 500 cycles), and enhanced rate capability, much better than other counterparts (PRC/S and rGO/S). The excellent properties are attributed to the advantages of PRC/Ni network with a high electrical conductivity, strong adsorption/blocking ability for polysulfides, and interconnected porous framework.

中文翻译：

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爆米花启发的多孔大细胞碳：水稻的快速膨化制备及其在锂硫电池中的应用

电化学储能技术的进步与可控能源材料制造的突破紧密相关。受以玉米原料制造爆米花的启发，本文描述了一种独特的多孔大孔碳，该大孔碳由交联的纳米/微片通过大米前体的强力膨化组成。将大米从200°C的高压环境中以1.0 MPa的压力从密封环境中瞬间释放出来时，直接将其膨大约20倍。有趣的是，当将金属（例如，Ni）纳米粒子嵌入到膨化大米衍生的碳（PRC）中时，可以实现高品质的PRC /金属复合材料，并具有约7.2×10 ⁴ S m ^-1的高电导率，大孔隙率85.1％，表面积1492.2 m² g ^-1。PRC / Ni被用作锂硫电池的主体。设计的PRC / Ni / S电极在0.2 C时表现出1257.2 mA hg ^-1的高可逆容量，延长的循环寿命（500次循环后821 mA hg ^-1）和增强的倍率能力，远优于其他同类产品（PRC） / S和rGO / S）。优异的性能归因于PRC / Ni网络具有高导电率，对多硫化物的强吸附/阻断能力以及互连的多孔骨架等优点。